Daniel Vetter <daniel.vetter@xxxxxxxx> 於 2020年3月23日 週一 下午10:51寫道：
>
> It's right above the drm_dev_put().
>
> This is made possible by a preceeding patch which added a drmm_
> cleanup action to drm_mode_config_init(), hence all we need to do to
> ensure that drm_mode_config_cleanup() is run on final drm_device
> cleanup is check the new error code for _init().
>
> Aside: Another driver with a bit much devm_kzalloc, which should
> probably use drmm_kzalloc instead ...
>
> v2: Explain why this cleanup is possible (Laurent).
>
> v3: Use drmm_mode_config_init() for more clarity (Sam, Thomas)
>
Acked-by: Chun-Kuang Hu <chunkuang.hu@xxxxxxxxxx>
> Acked-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
> Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
> Cc: Thomas Zimmermann <tzimmermann@xxxxxxx>
> Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
> ---
> drivers/gpu/drm/mediatek/mtk_drm_drv.c | 9 ++++-----
> 1 file changed, 4 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> index 0563c6813333..2eaa9080d250 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> @@ -162,7 +162,9 @@ static int mtk_drm_kms_init(struct drm_device *drm)
> }
> private->mutex_dev = &pdev->dev;
>
> - drm_mode_config_init(drm);
> + ret = drmm_mode_config_init(drm);
> + if (ret)
> + return ret;
>
> drm->mode_config.min_width = 64;
> drm->mode_config.min_height = 64;
> @@ -179,7 +181,7 @@ static int mtk_drm_kms_init(struct drm_device *drm)
>
> ret = component_bind_all(drm->dev, drm);
> if (ret)
> - goto err_config_cleanup;
> + return ret;
>
> /*
> * We currently support two fixed data streams, each optional,
> @@ -255,8 +257,6 @@ static int mtk_drm_kms_init(struct drm_device *drm)
> dma_dev->dma_parms = NULL;
> err_component_unbind:
> component_unbind_all(drm->dev, drm);
> -err_config_cleanup:
> - drm_mode_config_cleanup(drm);
>
> return ret;
> }
> @@ -272,7 +272,6 @@ static void mtk_drm_kms_deinit(struct drm_device *drm)
> private->dma_dev->dma_parms = NULL;
>
> component_unbind_all(drm->dev, drm);
> - drm_mode_config_cleanup(drm);
> }
>
> static const struct file_operations mtk_drm_fops = {
> --
> 2.25.1
>
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